Solvent extraction of oil from bani (Pongamia pinnata (L.) Pierre) seeds

Issue Date

4-2012

Abstract

Bani (Pongamia pinnata (L.) Pierre) seeds were extracted using Soxhiet apparatus to determine which among hexane, cyclohexane, and petroleum ether would be a more suitable solvent for extraction of bani oil. Seed moisture content, the presence of seed coat, and grinding of the seeds affected oil yield by solvent extraction. Hexane, which is relatively lower in cost than cyclohexane, proved to be a practical solvent for sundried uncoated ground bani seeds, showing bani oil content of up to 56% with Soxhiet extraction. However, simple soaking of the ground bani seeds in hexane provided lower oil recovery compared with Solvent extraction. Experiments to determine effects of soaking time, seed mass-to-solvent ratio, and soaking temperature showed favorable soaking time and temperature of 8 hrs and 35˚ C, respectively, while oil recovery increased as seed-mass-to-solvent-volume ratio did not result in significant increases in oil recovery. Important physico-che mical properties of the solvent-extracted oil were datermined, showing a specific gravity of 0.92764 ± 0.0052 at 25˚ C, saponification number of 195.7 mg KOH/g oil, iodine value of 56.35 g l₂/100 g oil, and a free fatty acid value of 5.41 mg KOH/g oil.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463x

Volume

37

Issue

1

Page

1-7

Document Type

Article

Frequency

tri-quarterly

Physical Description

tables/graphs

Language

English

This document is currently not available here.

Share

COinS